code: def get_affine_rasmm_to_trackvis(header):
      return np.linalg.inv(get_affine_trackvis_to_rasmm(header))
  
imports: import os
  import string
  import struct
  import warnings
  import numpy
  import nibabel
  from nibabel.openers import Opener
  from nibabel.orientations import aff2axcodes, axcodes2ornt
  from nibabel.volumeutils import endian_codes, native_code, swapped_code
  from .array_sequence import create_arraysequences_from_generator
  from .header import Field
  from .tractogram import LazyTractogram, Tractogram, TractogramItem
  from .tractogram_file import DataError, HeaderError, HeaderWarning, TractogramFile
  from .utils import peek_next
label_desc: Use image node_id 2 for calling a global function with example usage: get_affine_rasmm_to_trackvis(header) and returns: np